path: root/extensions/
diff options
authorJan Engelhardt <>2008-01-20 13:25:08 +0000
committerPatrick McHardy <>2008-01-20 13:25:08 +0000
commit36f2eadca556da9bb4979b3f67f38020e80ef7d2 (patch)
treebe21b6fafa6fd9e816aac132be6371103ccf0235 /extensions/
parent0720c1226381f5c71748673c43c12499f1f254c7 (diff)
Move libipt_TOS revision 0 to libxt_TOS revision 0 and add support for xt_TOS target revision 1. Signed-off-by: Jan Engelhardt <>
Diffstat (limited to 'extensions/')
1 files changed, 27 insertions, 0 deletions
diff --git a/extensions/ b/extensions/
new file mode 100644
index 00000000..d9b774aa
--- /dev/null
+++ b/extensions/
@@ -0,0 +1,27 @@
+This module sets the Type of Service field in the IPv4 header (including the
+'precedence' bits) or the Priority field in the IPv6 header. Note that TOS
+shares the same bits as DSCP and ECN. The TOS target is only valid in the
+\fBmangle\fR table.
+\fB--set-tos\fR \fIvalue\fR[\fB/\fR\fImask\fR]
+Zeroes out the bits given by \fImask\fR and XORs \fIvalue\fR into the
+TOS/Priority field. If \fImask\fR is omitted, 0xFF is assumed.
+\fB--set-tos\fR \fIsymbol\fR
+You can specify a symbolic name when using the TOS target for IPv4. It implies
+a mask of 0xFF. The list of recognized TOS names can be obtained by calling
+iptables with \fB-j TOS -h\fR.
+The following mnemonics are available:
+\fB--and-tos\fR \fIbits\fR
+Binary AND the TOS value with \fIbits\fR. (Mnemonic for \fB--set-tos
+0/\fR\fIinvbits\fR, where \fIinvbits\fR is the binary negation of \fIbits\fR.)
+\fB--or-tos\fR \fIbits\fR
+Binary OR the TOS value with \fIbits\fR. (Mnemonic for \fB--set-tos\fR
+\fB--xor-tos\fR \fIbits\fR
+Binary XOR the TOS value with \fIbits\fR. (Mnemonic for \fB--set-tos\fR